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Blaize Denfeld

Blaize Denfeld
Deputy Director for the Swedish Infrastructure for Ecosystem Science (SITES) program, coordinating and promoting the use of long-term monitoring data for terrestrial and aquatic research.


I am an earth system scientist with expertise in freshwater ecosystems. Throughout my career I have embraced multi-disciplinary and international research efforts focused on the impacts of climate change on boreal and arctic inland waters. I also have a passion for understanding and facilitating scientific collaborations.    


My primary research aim is to assess impacts of climate change ​on land-water-atmosphere interactions. I focus on terrestrial and aquatic ecosystem links, primarily by assessing biogeochemical cycles across scales, spanning from a broader watershed perspective to the underlying microbial processes. I utilize a mix of field and lab based methods, combined with remote sensing and sensor technology to broaden scientific knowledge across space and time. While I have a broad interest in aquatic biogeochemical cycles, I specialize in assessing greenhouse gas dynamics and winter (ice-covered) processes. 

Selected publications

Denfeld, B.A., A. Lupon, H. Laudon, R.A. Sponseller, J. Karlsson. 2020. Heterogeneous CO2 and CH4 patterns across space and time in a small boreal lake. Inland Waters, doi: 10.1080/20442041.2020.1787765.  

Knoll, L.B., S. Sharma, B.A. Denfeld, G. Flaim, Y. Hori, J.J. Magnuson, D. Straile, G.A. Weyhenmeyer. 2019. Consequences of lake and river ice loss on cultural ecosystem services. Limnol. Oceanogr. Letters, doi: 10.1002/lol2.10116. 

Lupon, A., B.A. Denfeld, H. Laudon, J Leach, J. Karlsson, R.A. Sponseller. 2019. Groundwater inflows control patterns and sources of greenhouse gas emissions from streams. Limnol. Oceanogr, doi: 10.1002/lno.11134. 

Marieke A. Frassl, M.A., D.P. Hamilton, B.A. Denfeld, E. de Eyto, S.E. Hampton, P.S. Keller, S. Sharma, A.S.L. Lewis, G.A. Weyhenmeyer, C.M. O’Reilly, M.E. Lofton, N. Catalán. 2018. Ten simple rules for collaboratively writing a multi-authored paper. PLoS Comput Biol 14:

Denfeld, B.A., M. Klaus, H. Laudon, R.A. Sponseller & J. Karlsson. 2018. Carbon dioxide and methane dynamics in a small boreal lake during winter and spring melt events. J. of Geophys. Res. Biogeosciences, doi: 10.1029/2018JG004622.

Denfeld, B. A., H. Baulch, S.E. Hampton, P. Del Giorgio & J. Karlsson. 2018. A synthesis of carbon dioxide and methane dynamics during the ice-covered period of northern lakes. Limnol. Oceanogr. Letters, doi: 10.1002/lol2.10079.

Denfeld, B.A., P. Kortelainen, M. Rantakari, S. Sobek, G.A. Weyhenmeyer. 2016. Regional variability and drivers of below ice pCO2 in boreal and subarctic lakes. Ecosystems, 19: 461-476. 

Denfeld, B.A.*, M. Ricão Canelhas *, G.A. Weyhenmeyer, S. Bertilsson, A. Eiler & D. Bastviken. 2016. Constraints on methane oxidation in ice-covered boreal lakes. J. of Geophys. Res. Biogeosciences, 121: 2016JG003382.

Ricão Canelhas, M.*, B.A. Denfeld*, G.A. Weyhenmeyer, D. Bastviken & S. Bertilsson. 2016. Methane oxidation at the water-ice interface of an ice-covered lake. Limnol. Oceanogr, 61: 1814-25.